Which of the following events took place during jefferson's term in office?

he increased the size of the army.
he maintained the property requirements for voting.
he increased the power of the supreme court.
he became the first president to represent the federalist party.

The correct answer is "He increased the size of the Army".

Thomas Jefferson strongly believed it was necessary to establish an educational institution for the Army, as he did not saw it feasible to import overseas engineers with "questionable loyalty" to oversee military improvements. This, in addition to the occurrence of the first  Barbary War, in which the US had to deal with Pirate ships who were assaulting American merchant ships, led to an important increase in the country's armed forces.